2517378161 has 2 divisors, whose sum is σ = 2517378162. Its totient is φ = 2517378160.

The previous prime is 2517378133. The next prime is 2517378163. The reversal of 2517378161 is 1618737152.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2195391025 + 321987136 = 46855^2 + 17944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2517378161 is a prime.

Together with 2517378163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2517378163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258689080 + 1258689081.

It is an arithmetic number, because the mean of its divisors is an integer number (1258689081).

Almost surely, 2^2517378161 is an apocalyptic number.

It is an amenable number.

2517378161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2517378161 is an equidigital number, since it uses as much as digits as its factorization.

2517378161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 41.

The square root of 2517378161 is about 50173.4806546247. The cubic root of 2517378161 is about 1360.3463220169.

The spelling of 2517378161 in words is "two billion, five hundred seventeen million, three hundred seventy-eight thousand, one hundred sixty-one".